Autodesk has officially introduced AutoCAD 2011 for Mac OS X, bringing its freeform 3D design and drafting tools back to the Mac after an 18 year hiatus. The program is designed to seamlessly migrate AutoCAD DWG documents between Mac and Windows PC users, enabling companies to deploy the software without regard to hardware and operating system their users have.
The company notes that "you can create custom scripts, linetypes, hatch patterns, and command aliases, as well as AutoLISP and ObjectARX applications, in AutoCAD 2011 for Mac; however, there's no support for DCL in AutoLISP, nor is there access to some of the custom AutoCAD user interface controls in ObjectARX. Technologies specific to Windows, such as Visual Basic for Applications, OLE objects, and Windows Media Audio, aren't supported in AutoCAD 2011 for Mac."
Autodesk has also released a free iOS app called AutoCAD WS for the iPhone, iPod touch and iPad that enables users to view, share, and make minor modifications to their designs DWG format. There is also a web based tool for online document review and editing.
Download: iOS app (iTunes link)